Lexus ES300 (2002 year). Manual — part 372
A53763
VC
E2
A53769
E2
PTNK
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-107
260
9
CHECK VACUUM HOSES(8,9,10 AND 11 IN CIRCUIT DESCRIPTION)
(a)
Check that the vacuum hose is connected correctly.
(b)
Check the vacuum hose for looseness and disconnection.
(c)
check the vacuum hose for cracks, hole, damage and blockage.
NG
CHECK FUEL TANK OVER FILL CHECK VALVE
OK
10
INSPECT ECM(VC - E2)
(a)
Turn the ignition switch ON.
(b)
Measure voltage between terminals VC and E2 of the
ECM connector.
Voltage: 4.5 - 5.5 V
NG
CHECK AND REPLACE ECM
OK
11
INSPECT ECM(PTNK - E2)
(a)
Remove the fuel tank cap.
(b)
Turn the ignition switch ON.
(c)
Measure the voltage between terminals PTNK and E2 of
the ECM connector.
Voltage: 3.0 - 3.6 V
OK
NG
12
CHECK HARNESS AND CONNECTOR(VAPOR PRESSURE SENSOR - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE VAPOR PRESSURE SENSOR ASSY
A53763
E2
EVP1
VSV is ON
VSV is OFF
Air
F
E
Air
F
E
A52140
05-108
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
261
13
CHECK VSV (FOR EVAP)
(a)
Turn the ignition switch ON.
(b)
Check the VSV function.
(1)
Connect between terminal EVP1 and E2 of the
ECM connector (VSV ON).
VSV is ON:
Air from port E flows out through port F
(2)
Disconnect between terminal EVP1 and E2 of the
ECM connector (VSV OFF).
VSV is OFF:
Air does not flow port E to port F
OK
NG
14
CHECK OPERATION OF VSV(FOR EVAP) (See page
OK
Go to step 15
NG
REPLACE VSV AND CHARCOAL CANISTER, AND THEN CLEAN VACUUM HOSE
15
CHECK HARNESS AND CONNECTOR(E.F.I.ECU RELAY - VSV FOR EVAP, VSV
FOR EVAP - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE ECM
A53763
E2
CCV
VSV is ON
VSV is OFF
E
F
E
F
Air
Air
A12540
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-109
262
16
CHECK VSV (FOR CCV)
(a)
Turn the ignition switch ON.
(b)
Check the VSV function.
(1)
Connect between terminal CCV and E2 of the ECM
connector (VSV ON).
VSV is ON:
Air does not flow from port E to port F
(2)
Disconnect between terminal CCV and E2 of the
ECM connector (VSV OFF).
VSV is OFF:
Air from port E flows out through port F
OK
NG
17
CHECK OPERATION OF VSV(FOR CCV) (See page
OK
Go to step 18
NG
REPLACE VSV AND CHARCOAL CANISTER, AND THEN CLEAN VACUUM HOSE
18
CHECK HARNESS AND CONNECTOR(E.F.I. ECU RELAY - VSV FOR CCV, VSV
FOR CCV - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE ECM
A53769
E2
TBP
VSV is ON
VSV is OFF
Air
E
F
Air
E
F
A52143
05-1 10
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
263
19
CHECK VSV (FOR PRESSURE SWITCHING VALVE)
(a)
Turn the ignition switch ON.
(b)
Check the VSV function.
(1)
Connect between terminal TBP and E2 of the ECM
connector (VSV ON).
VSV is ON: Air from port E flows out through port F
(2)
Disconnect between terminal TBP and E2 of the
ECM connector (VSV OFF).
VSV is OFF: Air does not from flow port E to port F
OK
NG
20
CHECK OPERATION OF VSV(FOR PRESSURE SWITCHING VALVE)
(See page
)
OK
Go to step 21
NG
REPLACE VSV AND CHARCOAL CANISTER, AND THEN CLEAN VACUUM HOSE
21
CHECK HARNESS AND CONNECTOR(E.F.I. ECU RELAY - VSV FOR PRESSURE
SWITCHING VALVE, VSV FOR PRESSURE SWITCHING VALVE - ECM)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE ECM
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